[BUG] Typescript - Multiple imports missing comma

Bug Report Checklist

Description

The following yaml file has multiple instances where two exports are import into the same file:
eg:

import { this that } from "./example.ts";

Problem being, the comma is missing in the above example, for instance the correctly generated code should be:

import { this, that } from "./example.ts";

openapi-generator version

Latest npm version

Steps to reproduce

1. Download the code snippet above in the description
2. npx @openapitools/openapi-generator-cli generate -i beacon-node-oapi.yaml -g typescript-node -o ./generated-source
3. Navigate to generated-typescript/api/beaconApi.ts line 37.
   You should see:

import { String  AnyType } from '../model/string  AnyType';

There are other instances of this, but this one stands out.

Run the provided openapi-generator command against beacon-node-oapi.yaml and inspect generated-typescript/api/beaconApi.ts around line 37. Trace the TypeScript generator or template responsible for imports; done means generated imports contain commas between multiple names, including the String and AnyType example.